(1)
North Atlantic Winter Seasonal Zones
I and II
-
(a) The North Atlantic Winter Seasonal Zone I
lies within the meridian of longitude 50°W from the coast of Greenland
to latitude 45°N, thence the parallel of latitude 45°N to
longitude 15°W, thence the meridian of longitude 15°W to latitude
60°N, thence the parallel of latitude 60°N to the Greenwich
Meridian, thence this meridian northwards.
-
(b) The North Atlantic Winter Seasonal Zone II
lies within the meridian of longitude 68°30'W from the coast of
the United States to latitude 40°N, thence the rhumb line to the
point latitude 36°N, longitude 73°W, thence the parallel of
latitude 36°N to longitude 25°W and thence the rhumb line
to Cape Toriñana.
Excluded from this zone are the North Atlantic Winter Seasonal
Zone I, the North Atlantic Winter Seasonal Area and the Baltic Sea
bounded by the parallel of latitude of The Skaw in the Skagerrak.
(2)
North Atlantic Winter Seasonal Area
The boundary of the North Atlantic Winter Seasonal Area is-
the meridian of longitude 68°30'W from the coast of the
United States to latitude 40°N, thence the rhumb line to the southernmost
intersection of the meridian of longitude 61°W with the coast
of Canada and thence the east coasts of Canada and the United States.
-
Seasonal periods:
For ships over 100 metres (328 feet) in length:
WINTER: 16 December to 15 February
SUMMER: 16 February to 15 December
-
For ships of 100 metres (328 feet) and under in length:
WINTER: 1 November to 31 March
SUMMER: 1 April to 31 October
(3)
North Pacific Winter Seasonal Zone
The southern boundary of the North Pacific Winter Seasonal Zone
is-
the parallel of latitude 50°N from the east coast
of the USSR to the west coast of Sakhalin, thence the west coast of
Sakhalin to the southern extremity of Cape Kril'on, thence the rhumb
line to Wakkanai, Hokkaido, Japan, thence the east and south coasts
of Hokkaido to longitude 145°E, thence the meridian of longitude
145°E to latitude 35°N, thence the parallel of latitude 35°N
to longitude 150°W and thence the rhumb line to the southern extremity
of Dall Island, Alaska.